[bug] align command line arguments with REPL functionality

Currently the command line does not support all functionality the REPL offers. Especially for automated deployments it would be useful to align both options into a central struct.

Currently missing from CLI:

- [ ] metrics
- [ ] offset rand
- [ ] rgbsplit
- [ ] txt
- [ ] rotation
- [ ] scale

Missing from REPL:
- [ ] ~~cpuprofile~~ *not trivial nor meaningful to add*
